5. Inventories

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories at March 31, 2019 and December 31, 2018 consisted primarily of finished antimony products, antimony metal, antimony ore, and finished zeolite products that are stated at weighted average lower of cost or estimated net realizable value. Finished antimony products, antimony metal and finished zeolite products costs include raw materials, direct labor and processing facility overhead costs and freight. Inventory at March 31, 2019 and December 31, 2018, is as follows:

	March 31,		December 31,
	2019		2018
Antimony Metal	$	158,532	$	8,127
Antimony Oxide		252,704		255,782
Antimony Concentrates		-		2,214
Antimony Ore		269,627		257,067
Total antimony		680,863		523,190
Zeolite		206,785		232,071
	$	887,648	$	755,261